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D3D11: Improved alpha/color test, like in GL/Vulkan

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This commit is contained in:
Henrik Rydgard 2017-02-14 10:34:55 +01:00
parent b5034c4e00
commit 56b3a823ba
1 changed files with 18 additions and 6 deletions
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16
GPU/Directx9/PixelShaderGeneratorDX9.cpp
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@ -112,14 +112,14 @@ bool GenerateFragmentShaderHLSL(const ShaderID &id, char *buffer, ShaderLanguage
if (enableAlphaTest) {
if (lang == HLSL_D3D11) {
WRITE(p, "uint roundAndScaleTo255f(float x) { return uint(floor(x * 255.0f + 0.5f)); }\n");
WRITE(p, "uint roundAndScaleTo255i(float x) { return uint(floor(x * 255.0f + 0.5f)); }\n");
} else {
WRITE(p, "float roundAndScaleTo255f(float x) { return floor(x * 255.0f + 0.5f); }\n");
}
}
if (enableColorTest) {
if (lang == HLSL_D3D11) {
WRITE(p, "uint3 roundAndScaleTo255v(float3 x) { return uint3(floor(x * 255.0f + 0.5f)); }\n");
WRITE(p, "uint3 roundAndScaleTo255iv(float3 x) { return uint3(floor(x * 255.0f + 0.5f)); }\n");
} else {
WRITE(p, "float3 roundAndScaleTo255v(float3 x) { return floor(x * 255.0f + 0.5f); }\n");
}
@ -278,9 +278,16 @@ bool GenerateFragmentShaderHLSL(const ShaderID &id, char *buffer, ShaderLanguage
const char *alphaTestFuncs[] = { "#", "#", " != ", " == ", " >= ", " > ", " <= ", " < " }; // never/always don't make sense
if (alphaTestFuncs[alphaTestFunc][0] != '#') {
// TODO: Rewrite this to use clip() appropriately (like, clip(v.a - u_alphacolorref.a))
if (lang == HLSL_D3D11) {
WRITE(p, " if ((roundAndScaleTo255i(v.a) & u_alphacolormask.a) %s u_alphacolorref.a) discard;\n", alphaTestFuncs[alphaTestFunc]);
} else {
WRITE(p, " if (roundAndScaleTo255f(v.a) %s u_alphacolorref.a) clip(-1);\n", alphaTestFuncs[alphaTestFunc]);
}
} else {
// This means NEVER. See above.
if (lang == HLSL_D3D11)
WRITE(p, " discard;\n");
else
WRITE(p, " clip(-1);\n");
}
}
@ -303,9 +310,14 @@ bool GenerateFragmentShaderHLSL(const ShaderID &id, char *buffer, ShaderLanguage
const char *colorTestFuncs[] = { "#", "#", " != ", " == " }; // never/always don't make sense
if (colorTestFuncs[colorTestFunc][0] != '#') {
const char * test = colorTestFuncs[colorTestFunc];
if (lang == HLSL_D3D11) {
WRITE(p, " uint3 v_scaled = roundAndScaleTo255iv(v.rgb);\n");
WRITE(p, " if ((v_scaled & u_alphacolormask.rgb) %s (u_alphacolorref.rgb & u_alphacolormask.rgb)) discard;\n", colorTestFuncs[colorTestFunc]);
} else {
WRITE(p, " float3 colortest = roundAndScaleTo255v(v.rgb);\n");
WRITE(p, " if ((colortest.r %s u_alphacolorref.r) && (colortest.g %s u_alphacolorref.g) && (colortest.b %s u_alphacolorref.b )) clip(-1);\n", test, test, test);
}
}
else {
WRITE(p, " clip(-1);\n");
}